But to do a good job, communities need strong property rights and often technical help.
但为了取得良好效果，社区需要很强的产权，通常还需要技术上的帮助。
Property management brand, depending on experience and technical support.
物业管理的品牌，是靠经验和技术支撑的。
Withchemicals of ordinary quality and simple technical equipment, samples of good PTC property were obtained.
结果用普通的化学原料和简单的工艺设备，做出了有较好PTC性能的样品。
Withchemicals of ordinary quality and simple technical equipment, samples of good PTC property were obtained.
结果用普通的化学原料和简单的工艺设备，做出了有较好PTC性能的样品。
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